Couldn't select 'Sprite Shape Profile' upper and lower angle ranges by clicking on it

Steps to Repro:
1. Open attached project > assets
2. Select sprite shape profile
3. Try to select upper and lower range of angle ranges circle

Actual Result:
1. Observe that the ranges do not get selected
2. Try clicking little above the circle, now the range gets selected

Expected Result:
Range should get selected easily

Note:
I suspect that the clicking area for the range is moved little upwards than the defined area

Occurring With:
2018.2.0a7, 2018.2.0a5

Working With:
2018.2.0a4, 2018.2.0a1, 2018.1.0b13

Environment:
Windows 10, Mac 10.12, 10.13